Stiffening of printing presses



Aug. 12, 1924. 1,504,979

M. ROGKSTROH STIFFENING OF' PRINTING PRESSES Filed oct. 12. 1920 Ese @gg/www? Patented Aug. 12, 1924,

UNITED STATES MAX ROCKSTBJOI-I, OF KLEIN SEDLITZ, PIR-NA, GERMANY.

STIFFENING OF PRINTING PRESSES.

Application filed October 12, 1920.

Serial No. 116,585.

(GRANTED UNDER THE PRQVISINS DF THE ACT DF MARCH 3, 1921, A1 STAT. L., 1813.)

T all whoml it may concern:

Be it known that I, MAX Rocxs'rnorr, manufacturer, a citizen of the German Republic, residing at Klein Sedlitz, near Pirna,

5 Saxony, Germany, have invented certain new and useful Improvements in the Stiilening of Printing Presses (for which I have filed applications in Germany on March 6, 1918, Patent No. 845,870; in Austria on March 20, 1918; in Hungary on March 18, 1918; in Switzerland on March 21, 1918, Patent No. 79,772; in Denmark on March 22, 1918; in Italy on April 10, 1918; in Great Britain on April 6, 1918, Patent No. 117,591; and in France on May 22, 1918, Patent No. 516,4110), of which the following is a specication.

Almost all printing presses have the detect, that under great strains the side trames how out sideways at the cylinder-hearings and become elastic. Even when the side trames are gripped by the undertrame to the highest permissible limit the spread of the side trames cannot be wholly avoided.

The object of the invention is to overcome this diiiiculty, which object is attained by connecting the side frames together in the locality of the bearings ot the pressure cylinder. This connection can, for instance, be effected by rigidly mounting the axle of the printing cylinder in the side :trames so as to serve as a stiiiener, the pressure cylinder at the same time running on said axle, or rigidly mounting the pressure cylinder on revolving axle which has a longitudinal bore tc receive the cross-hrace serving for the connection of the side frames.

The invention is illustrated in the annexed drawing and shows in the single ligure one :torm of execution in vertical section.

Referring to the figure, the side frames b and c are fixed on the base a. d is the axle of the pressure cylinder c, which is arranged thereon by means of the sleeve f revolving on cl. The axle CZ with its ends passes through the cheeks of the side Jframes b and c and is rigidly connected with the side frames by means of the end-plates g and the screw-bolts h, which are screwed into the main ends, so that the side fra-mes cannot spring out laterally. The grub screws i serve to prevent the rotation ot the axle d.

7c is the base 'for the printing frame.'

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a printing press, a base, side Jframes carried by and extending upwardly from said base, said side frames each having an aperture adjacent its upper end, an axle extending through said apertures, each end ot said axle having means associated therewith and engaging the outer side of one of said trames to prevent said trames from spreading, each of said frames having means asso 65 ciated therewith and engaging said axle to secure said axle against rotation, and a pressure cylinder rotatably mounted on said axle.

2. In a printing press, a base, side trames extending upwardly 'from said base and hav- 70 ing hearings therein, an axle having its ends resting in said bearings, set screws for preventing rotation ot said axle, end plates tor preventing longitudinal movement of said axle relative to the side trames, and a pressure cylinder rotatably mounted on said axle` In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

MAX ROCKSTROI'I.

Witnesses f VVALDEMAR DRING, KARL WEBER. 

